From the announcement:
It gives me great pleasure to announce that the NPC Pack, funded via Kickstarter, is now available in limited numbers for pre-order. In addition I have also made eight individual dice, currently in production, available.
Please note that they will be shipped from the 14th of December as I will be fulfilling Backer rewards until that point. Pre-orders should therefore be in UK and EU destinations in time for Christmas. Regrettably I can not guarantee delivery in time for those in ROW destinations